Motor-car heating



A. DENMAN-JONES.

' Jan. 9, 1923.

Mo'r oR CAR HEATING Fl LED SEPT. 28. 1920.

, @atente Jan. 9. 1923 v i w rt 1" a was n w l it i an 231 it titMoron-can rrna'rrue.

Application filed September as, 1926. ferial Ito. 413,339.

To all whom it may concemr Be it known that I, Amman DENMAN- Jones, asubject of the King of Great Britain, residing at 37 HarthamRoachl-lollo- 5 way, in the county of London, England,

have invented new and useful Improvements in Motor-Car Heating, of whichthe followin is a specification.

lvly invention relates to heating systems using hot air derivedprimarily from the engine, the hot air being circulated in warmingapparatus within the body of the car by any suitable means.

F or brevity I designate such portion of the apparatus as warms 0rcollects the heated air the collector, and the actual warming apparatusfor the passengers within the car body the warmer.

With warming apparatus consisting fundarnentally of tubes or channelsthrough which hot. air circulates, I have found that to obtain a uniformheat throughout the warmer, it is essential that a comparatively rapidflow of air should be maintained.

In order to regulate the degree of heat in the warmer it has been usualto insert an ordinary valve or stop cock to reduce the flow of airthrough the warmer, but I have found that simple throttling of theincoming hot air has material disadvantages. The efiect is generally toreduce the velocity of the hot air flowing through the heatingapparatus. The effect of thi reduction of velocity is two-fold. Firstly,the air will move more slowly through the collector with the result thatit will be raised to a higher temperature; (this is particiilarlyevident when the hot air is collected iironi a hot surface, such as theexhaust pipe). Scc0ndly,

'the reduction in the rate offiow will produce unequal heat in thewarifner, and in actual practice closing of a throttle valvemay resultin the inlet end of the warmer attaining ahigher temperature than whenthe valve is fully open, although the outlet end may be colder.

According to my invention I provide a regulating valve such that,simultaneously with the throttling of the hot air flowing into thewarmer, unheated air is allowed to enter, thus equalizing, but at thesame time reducing, the temperature of the-warmer. it. is alsoadvantageous by opening a by-pass to allow the surplus hot-hi1- to flowfrom the collector into the atmosphere, thus provid-A l we ing againstany excessive rise in temperature of the collector.

My invention. is illustrated in the accompanying drawings in whichFigure 1 is a side elevation of an automobile fitted with a collector, awarmer and a regulating valve.

Figure 2 is a sectional view of the valve, and

Figure ure 2.

A. is a collector which comprises a pipe surrounding the exhaust pipe Band leading from the engine G through a regulating valve to a warmer Ein the body of the car from which. the hot air is ejected. through apipe F by an exhauster G into which the end of the exhaust pipe B leads.

: The regulating valve is constructed as follows H is a valve seatingmounted on the collector A. On this seating works a slide valve 3 havingparts K and L at right angles to the main face of the valve and operatedby a wire M. N is a connection to the car warmer having a cold air inlet0 which when the valve J is shut is closed by the part K and when thevalve is fully open is closed by the part L. The valve is nor mally keptclosed by the action of the spring P.

In the position shown the connection h to the car heater is closed andthe hotair from the collector escapes through a port or vent Q. to theatmosphere As the valve is opened by being moved to the right the inlet0 is uncovered, the connection il gradiiially opened and the vent Q is asection on the line 2-2, Figclosed, but when the valve is fully openedcarrying away the exhaust gases from theengine. a pipe heated by theexhaust gases for coiulucting heated air from the engine compartment orcasing to the warmer. and us associated with said mentioned "'Iscontrolling the passage of warm air to the warmer and'the entrance oftool air to said conducting means, and m ans for operating the valve toclose said opening and fully open the supply of warm air to said warmer.

3. The combination with the body of an automobile and the propellingengine thereof, of a pipe for carrying away the exhaust gases irom theengine, an air warming pipe surrounding, the exhaust pipe, a \mrmerWithin the bod" means for reducing the pressure within the armor beneaththat of the atmosphere, a pipe opening out of the Warming pipe andleading to the warmer and having in it an oriliee thrtmgh which cold aircan enter and a valve rontrolling the passage of warm air from thewarming pipe to this last, mentioned pipe and also the entrance of coldair into this last mentioned pipe. I In testimony that l elaini theforegoing as my invention I have signed my name this l-zlth day ofSeptember, 1920.

